Every semester, UC Berkeley webcasts select courses and events for live viewing and on-demand replay over the Internet.

Courses appear to lean in the direction of science and technology and stream using Realplayer (sorry!), and archives go back as far as Fall 2001. If you're into college learning without the hefty pricetag, Berkeley's free webcasts of entire semesters-worth of courses are a pretty cool way to pick up some extra brain food in your spare time.